High-efficiency linear power amplification system and implementation method thereof

The invention discloses a high-efficiency linear power amplification system and an implementation method thereof. According to the system, radio-frequency signals are divided into through signals and coupling signals through a coupling circuit, wherein pre-distortion is carried out on the through signals, the through signals are directly input into a Doherty amplifier, and power amplification is carried out on the through signals; at the same time, a signal bandwidth recognition circuit recognizes instant bandwidths of the coupling signals, a control unit regulates grid voltage of a microwave power transistor in a peak value amplifier according to the instant bandwidths before the Doherty amplifier carries out power amplification on the through signals, so that the working state of the peak value amplifier is regulated. Due to the fact that the working state of the peak value amplifier is regulated, when the radio-frequency signals are wideband signals, efficiency of the Doherty amplifier is sacrificed approp